﻿/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

using System.Linq;

namespace Lucene.Net.Queries.Function.ValueSources
{


    /// <summary>
    /// <code>SumFloatFunction</code> returns the sum of it's components.
    /// </summary>
    public class SumFloatFunction : MultiFloatFunction
    {
        public SumFloatFunction(ValueSource[] sources)
            : base(sources)
        {
        }
        protected override string Name
        {
            get { return "sum"; }
        }

        protected override float Func(int doc, FunctionValues[] valsArr)
        {
            return valsArr.Sum(vals => vals.FloatVal(doc));
        }
    }
}